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Upper Aragon and Gallego basins

Geographical location

The study area extends for  1727 km2  in the Central Pyrenees. In the area debris flows are common.


Debris flows in the study area

 

Location of 126 debris flows observed on aerial photographs taken in the year 1956.

 

Location of 76 debris flows observed on aerial photographs taken in the year 1977.

 

Location of 46 debris flows observed on aerial photographs taken in the year 1990.

 

Location of 30 debris flows observed in the field in 2001.

 

Morphometrical characteristics of debris flows in the study area

Number

Location

Altscar

Altbase

DH

Length

Scarº

Canalº

Baseº

Deposit

Scar

Canal2

Base2

Volume

a

1

Solana

1325

1195

130

178.20

22

35

9

29.50

18.50

8

12

205.4

 

2

Solana

1335

1265

70

105

34

 

 

 

26

 

 

405.6

 

3

Solana

1280

1260

20

56

31

29

8

14.50

13.50

4

8

109.4

.7

4

Solana

1257

1228

29

30

40

41

9

23.60

8.60

5.60

15

44.4

.8

5

Solana

1297

1265

32

53.70

31

41

8

5.80

7.40

3

4

32.9

.2

6

Solana II

1240

1210

30

48.50

44

44

10

20

14.70

 

3

129.7

.7

7

Solana II

1245

1195

50

50

39

33

 

 

8.80

4

 

46.5

 

8

Solana II

1255

1210

45

58.50

29

42

 

25.50

10.80

3.50

 

70.0

.6

9

Solana II

1250

1210

40

49.50

30

34

8

29.60

9.80

4.50

 

57.6

.7

10

Solana II

1245

1230

15

24

31

32

 

10.30

7.70

 

 

35.6

.7

11

Valle Aisa

1145

1115

30

25

40

40

 

 

7.50

5

 

33.8

 

12

Valle Aisa

1165

1130

35

35

40

35

 

 

10

8

 

60.0

 

13

Valle Ijuez

1117

1095

22

55.50

29

30

10

15.50

13.10

5.80

15

103.0

.7

14

Valle Ijuez

1150

1095

55

63.50

37

35

 

20

18.80

4.50

 

212.1

.4

15

Valle Ijuez

1205

1170

35

50.60

43

35

 

16

11.20

8

 

75.3

.5

16

Valle Ijuez

1250

1190

60

70

43

45

 

13

11

5

 

72.6

.2

17

Valle Ijuez

1255

1200

55

60

42

40

 

15

15

 

10

135.0

.3

18

Solana

1125

1075

50

87

38

40

 

15

21

5.50

12

264.6

.3

19

Solana

1320

1280

40

65

39

41

 

 

17

6.50

 

173.4

 

20

Solana

1180

1105

75

55

40

39

 

12

15

5

10

135.0

.2

21

Solana

1315

1270

45

60

38

37

22

15

16

7

12.50

153.6

.3

22

Solana

1255

1210

45

38

40

37

 

 

9.50

4.50

 

70.0

 

23

Ijuez

1130

1070

60

55

37

38

19

10

12

6.50

8

86.4

.2

24

Ijuez

1080

1015

65

72

43

39

 

 

15

5.50

 

130.0

 

25

Ijuez

1140

1110

30

40

35

36

 

 

 

10

 

100.0

 

26

Ijuez

1190

1168

22

28.30

42

38

 

 

11.10

8

 

70.0

 

27

Ijuez

1175

1160

15

45

35

36

 

 

30

 

 

540.0

 

28

Ijuez

1430

1385

45

50

34

39

15

10

12

5.60

8.10

86.4

.2

29

Ijuez

1230

1165

65

85

38

40

 

 

17.50

6.90

 

183.8

 

30

Ijuez

1320

1272

48

62

42

38

 

 

15

7.30

 

105.0

 

31

Ijuez

1340

1295

45

56

34

35

 

 

16

 

 

153.6

 

32

Ijuez

1060

1005

55

72

39

41

22

8

13.40

4.50

9

172.0

.1

33

Arnas

1125

1080

45

75

35

34

20

8

14.10

6.80

8

204.0

.2

34

Arnas

1090

1070

20

25

42

 

 

 

8.90

 

 

47.5

 

35

Arnas

1145

1100

45

67.40

33

35

21

20

16

5.60

9.50

210.0

.4

36

Arnas

1175

1140

35

40

41

42

15

13

13.40

4.50

11.60

107.7

.4

37

Ijuez

970

961

9

 

38

38

 

 

12.80

4.50

 

115.2

 

38

Ijuez

982

975

7

10.20

35

 

 

 

8.20

 

 

33.6

 

39

Ijuez

1172

1050

122

52.60

33

33

 

25.30

20.30

 

 

226.6

.2

40

Ijuez

1270

1236

34

45.40

32

34

16

23

14.60

4

 

127.9

.7

41

Ijuez

1350

1305

45

60.30

34

32

13

28.90

15.90

6.70

 

202.2

.6

42

Ijuez

995

959

36

45.60

38

31

15

24.90

24.20

 

 

351.4

.7

43

Solana

1230

1195

35

46.40

32

32

21

35

13.60

 

 

185.0

1.0

44

Solana

1360

1330

30

52.80

33

29

16

55

15.80

 

 

237.2

1.8

45

Solana

975

910

65

84.90

31

30

21

49.50

11.10

4.20

 

86.2

.8

46

Solana

1125

1085

40

56.40

35

32

18

28.60

21.30

 

 

431.0

.7

47

Valle Fago

1120

1065

55

63.40

36

26

22

37.40

22.60

5.60

 

306.5

.7

48

Aisa

1235

1185

50

64.50

32

31

21

52

23

6.50

 

4232.0

1.0

49

Aisa

1205

1155

50

50.60

35

34

17

34

18.40

 

 

237.0

.7

50

Jasa

1345

1280

65

86

36

32

18

45.30

21.30

 

 

408.3

.7

51

Ijuez

1160

1140

20

48.50

31

30

22

20.80

15.50

 

 

.0

1.0

52

Ijuez

1185

1165

20

36.40

30

29

15

15.50

18.50

 

 

290.9

.8

53

Ijuez

1210

1180

30

16.50

32

32

17

16.40

12.40

 

 

123.0

.5

54

Ijuez

1215

1190

25

36.30

33

33

22

18.60

14.50

 

 

136.7

.7

55

Ijuez

1320

1285

35

56.70

32

33

25

23.20

15.60

 

 

133.8

.7

56

Ijuez

1225

1200

25

38.70

29

28

14

9.50

14.30

5

 

163.6

.4

57

Ijuez

1215

1195

20

42.50

30

30

16

15.30

16.40

 

 

161.4

.8

58

Ijuez

1205

1180

25

35

32

31

19

15.60

13.40

 

 

143.6

.6

59

Embun

1015

975

40

67

34

33

15

25

23

4.50

 

423.2

.6

60

Embun

1205

1140

65

80.50

35

 

18

32

21.30

5.60

 

363.0

.5

61

Viaducto

1105

1050

55

55

32

32

15

30.20

25.60

 

 

393.2

.5

62

Viaducto

1020

1000

20

45.30

35

 

15

10

15.60

 

 

133.8

.5

63

Viaducto

1010

990

20

36.70

31

 

23

8.40

21.10

 

 

267.1

.4

64

Castiello

997

980

17

 

38

35

15

 

 

 

 

111.1

 

65

Castiello

1030

945

85

 

33

37

21

 

 

3

 

145.0

 

66

Castiello

1145

1105

40

56.70

35

32

18

18.90

18.50

 

 

239.6

.5

67

Borau

1125

1095

30

48.90

34

32

15

15.60

18.40

 

 

270.8

.5

68

Borau

1245

1205

40

55

35

32

17

26.40

20.10

 

 

242.4

.7

69

Aisa

1155

1130

25

45

36

 

21

15.40

13.40

 

 

134.7

.6

70

Villanua

955

920

35

26.90

18.50

 

18.50

12.20

12.20

 

 

119.1

.3

71

Villanua

980

945

35

35.50

28

 

21

13.50

12.60

 

 

111.1

.4

72

Villanua

1065

1035

30

27.50

26.50

 

16

11.30

8.10

 

 

39.4

.4

73

Villanua

1235

1205

30

37.60

42

 

25

11.10

12.80

 

 

180.2

.4

74

Villanua

1190

1155

35

34.20

31

 

18.50

22.10

13.20

 

 

95.8

.6

75

Villanua

1245

1190

55

67

34

 

16

32.50

14.50

 

 

147.2

.6

76

Oros

1255

1230

25

32.50

45

34

26

28.50

15.50

 

 

192.2

1.1

77

Oros

1250

1225

25

40.10

41

38

27

27.40

16.70

 

 

223.1

1.1

78

Oros

1260

1175

85

92.60

43

 

26

55.60

24.50

 

 

480.2

.7

79

Oros

1258

1180

78

72

32

 

25

45.60

23.10

 

 

426.9

.6

80

Arguisal

1355

1335

20

26.50

35

 

20

12.60

15.60

 

 

219.0

.6

81

Arguisal

1020

995

25

35

32

 

17.50

35

38.50

 

 

1037.6

1.4

82

Arguisal

1000

950

50

67.30

33

32

15

39.50

11.90

 

 

77.9

.8

83

Arguisal

1005

960

45

73.90

33

32

25

29.70

16.60

8

 

179.1

.7

84

Villanua

1295

1280

15

22.30

24

 

15

10.40

9.40

 

 

57.4

.7

85

Aratores

1200

1165

35

81.90

29

25

16

23.60

13.10

4.50

 

103.0

.7

86

Aratores

1155

1120

35

76.50

33

33

18

33.50

21.40

3.50

 

297.7

1.0

87

Villanua

1117

1055

62

92

27

29

18

25.50

21.20

2.50

 

247.2

.4

88

Aisa

930

890

40

55

31

33

15

23.10

15.20

5.60

 

184.8

.6

89

Aisa

1050

1015

35

56.20

31

32

18

18.60

12.60

 

 

111.1

.5

90

Aisa

1035

985

50

84

29.50

32

14

26.80

25

5

 

562.5

.5

91

Aisa

1166

1120

46

69.50

32

31

16

25.60

15.60

4.50

 

206.9

.6

92

ijuez

1010

955

55

65.50

32

35

 

 

15.60

5

 

194.7

 

93

ijuez

1060

1025

35

56.90

35

34

15

20.50

12.60

3.60

 

127.0

.6

94

Castiello

1080

1020

60

83.40

34

35

19

46.30

19.60

5

 

345.7

.8

95

Castiello

1245

1202

42

55.60

32

34

16

18.90

12.60

3.80

 

134.9

.5

96

Villanua

1022

986

36

49.50

34

34

 

 

15.40

 

 

189.7

 

97

Villanua

1020

975

45

75.40

33

35

18

35.60

18.60

5

 

276.8

.8

98

Castiello

1047

990

57

89.40

35

37

14

40.20

21.30

4.50

 

1454.4

.7